プラグインとMod
Dalamudプラグインは起動中のFINAL FANTASY XIVに機能を追加します。XIVLauncherからゲームを起動し、チャットに /xlplugins と入力すると開く「プラグインインストーラ」から導入します。
各プラグインは一つのDalamud APIレベル向けに作られています。DalamudのAPIレベルが上がると、前のレベル向けのプラグインはインストーラに「(互換性なし)」と表示され、作者が更新するまで動きません。
Nexus ModsのModは自分のクライアント上でゲームのモデル、テクスチャ、サウンドを置き換えるもので、PenumbraまたはTexToolsで読み込みます。

Easily clean out your Glamour Dresser.

This is still mostly a dev tool for debugging, but people like it?

Push notify to your device when your duty is ready
Shows an overlay and/or sends alerts when your held currency items (or non-currency items) match configurable rules. A spiritual successor to CurrencyAlert.

Automatically rename your screenshots with character and location info.
Give your UI that premium, acrylic look upgrade. Because Eorzea looks better with some blur.
A classic arcade game.
Easily get general and role-specific hints in duties.
A mod that calculates what you can do with what you have.
Keep on top of new items.
I'm ready, I was just alt tabbed!
Never think too hard about your bags again!

A simple utility that allows easy export of your gearsets to xivgear.app.
Get notified when someone enters or exits your mount!
That sure is a beeg dinosaur eat window.

Takes a screenshot upon death (and other events).

Add sender target name in chat messages.

Show how much damage your DoTs have dealt so far

A game to play when dead. A Puzzle Bobble clone mini-game.

Splits combos into more button for more button bloating. Requires BLU spells.
Client for the Archipelago Multiworld Randomizer.
Automatically copy ANY text on your screen by choice.
Parses Buffs to help understand what your party is doing.

Lower 3D Resolution Scale

Changes your VO language on a per-duty basis
A Plugin that lets you add notes to item Tooltips

"See exactly where you stand."
Reminds you about retainer ventures.
View encounter strategy images.
See every item you and your party pick up, as it drops.
Adds Moonbase Alpha TTS when in Cosmic Exploration. aeiou!